tests: make workspace CI jobs enable workspace mode (#2435)

The CI setups claiming to run in WORKSPACE mode were wrong. This fixes
it.

Disable integration tests on Windows WORKSPACE mode. They are failing:
https://buildkite.com/bazel/rules-python-python/builds/9791#01934eac-3a03-445d-ad53-6683371ca289
Example failure: `java.lang.UnsatisfiedLinkError: 'int
com.google.devtools.build.lib.windows.WindowsFileOperations.nativeIsSymlinkOrJunction(java.lang.String,
boolean[], java.lang.String[])'`

---------

Co-authored-by: Richard Levasseur <rlevasseur@google.com>

.bazelci/presubmit.yml

diff --git a/.bazelci/presubmit.yml b/.bazelci/presubmit.yml
index 1808824..3d992ea 100644
--- a/.bazelci/presubmit.yml
+++ b/.bazelci/presubmit.yml
@@ -132,6 +132,7 @@
     bazel: last_rc
   ubuntu_workspace:
     <<: *reusable_config
+    <<: *common_workspace_flags
     name: "Default: Ubuntu, workspace"
     platform: ubuntu2004
   mac_workspace:
@@ -141,8 +142,30 @@
     platform: macos
   windows_workspace:
     <<: *reusable_config
+    <<: *common_workspace_flags
     name: "Default: Windows, workspace"
     platform: windows
+    # Most of tests/integration are failing on Windows w/workspace. Skip them
+    # for now until we can look into it.
+    build_targets:
+      - "--"
+      - "..."
+      # As a regression test for #225, check that wheel targets still build when
+      # their package path is qualified with the repo name.
+      - "@rules_python//examples/wheel/..."
+    build_flags:
+      - "--noenable_bzlmod"
+      - "--enable_workspace"
+      - "--keep_going"
+      - "--build_tag_filters=-integration-test"
+      - "--config=bazel7.x"
+    test_targets:
+      - "--"
+      - "..."
+    test_flags:
+      - "--noenable_bzlmod"
+      - "--enable_workspace"
+      - "--test_tag_filters=-integration-test"
 
   debian:
     <<: *reusable_config

tests/integration/local_toolchains/test.py

diff --git a/tests/integration/local_toolchains/test.py b/tests/integration/local_toolchains/test.py
index 63771cf..d85a4c3 100644
--- a/tests/integration/local_toolchains/test.py
+++ b/tests/integration/local_toolchains/test.py
@@ -18,8 +18,9 @@
             [shell_path, "-c", "import sys; print(sys.executable)"],
             text=True,
         )
-        expected = expected.strip()
-        self.assertEqual(expected, sys.executable)
+        expected = expected.strip().lower()
+        # Normalize case: Windows may have case differences
+        self.assertEqual(expected.lower(), sys.executable.lower())
 
 
 if __name__ == "__main__":